Device for ventilating the armatures of dynamo-electric machines



(No Model.)

E. WESTON.v a

DEVICE E011 VENT1LAT1NC THE ARMATUEES 01 DYNAMC ELECTRIC MAGHINES.

Il ii l/ I 110-245,900. Entente- 1 Aug. 16,1881.-

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UNITED STATES PATENT OFFICE.

EDWARD WESTON, OF NEWARK, NEW JERSEY.

DEVICE FOR VENTlLATlNG THE RMATURES 0F DYNAMO-ELECTRIC MACHINES.

SPECIFICATION forming part of Letters Patent No. 245,900, dated August 16, 1881.

Application filed J une 14, 1880, (No model.)

T0 all 'whom it may concern:

Be it known that I, EDWARD WEsToN, of Newark, New Jersey, have invented a certain Improvement in Devices for Ventilating the Armatures of Dynamo-Electric Machines of which the following is a specication.

My improvements relate to that class of dynamo-electric machines in which the rotating coils are wound upon a hollow core having apertures in its ends and in its periphery for the purpose of cooling the armature and adjacent parts by the agency of currents of air, Which,when the armatureis rotated, are drawn into the interior of the core through the apertures in its ends and expelled by centrifugal force through the apertures in its periphery; and my present invention consists in providing fans or blowers, preferably within the hollow core, for the purpose' of more etfectually maintaining currents of air through the apertures in the periphery of the armature.

Instead of arranging fans within or on the hollow core, I may combine them in various other ways with the hollow core and still attain the desired end.

The accompanying drawings, representing an armature embodying my invention, are as follows:

Figure l is a longitudinal section, showing the end apertures and the apertures in its periphery. Fig.2 is a transverse section through the line x :c on Eig. 1.

I have not deemed it necessary to show all the parts of a dynamo-electric machine, as my invention relates solely to the ventilatin g devices applied to the armature, and such machines are fully shown in Letters Patent of the United States Nos. 209,532 and 211,311, heretofore respectively granted to me October 29, 1878, and January 14, 1879.

The drawings represent an armature built up of thin iron perforated plates a, each of lwhich is centrally perforated for application upon the armature-shaft A, and is otherwise perforated to allow the circulation of air through the interior of the arma-ture.

The plates shown in the drawings are in the form of cog-wheels, the rims of which, a', are united to their hubs a2 by the two spokes aaf.

The teeth a4 are the polar exten sions referred to in my patents before mentioned,the coils O of the armature being Wound between the polar extensions, as shown.

The plates a are separated from each other by the collars B, each ofwhich is provided with two radially-projecting arms, b, which serve to fill the spaces between the adjacent spokes of the Wheels, and which constitute, in connection with the edges of the spokes, thc fans for throwing' the air outward through the apertures D in the periphery of the armaturethat is, through the open spaces between the adjacent rims and polar extensions of the wheels, respectively.

The place of the air ejected from the interior of the armature by the ceutrifu gal action of the fans is supplied by air drawn into the interior o f the armature through the apertures E in its ends.

It is obvious that, in lieu of separate fans on the several plates a, fans extending continuously through the whole series may be used.

Itis also obvious that the fans may be dispensed with and the armature connected to an ordinary fan-blower or other apparatus, and the air be thus forced through the armature.

I claim as my invention- They combination, with an armature of a dynamo-eleotric machine having its coils wound upon a hollow core provided with holes or apertures in its ends and in its periphery, of a blower or fan for more effectually causing currents of air to pass from the interior of the armature-core through the apertures of the periphery.

EDWARD WESTON. 

